Limnology

Study on River Rupnarayan

— by Bishruti Chowdhury, October 31, 2021 —

1. Introduction

The Rupnarayan River originates from West Medinipur as the river Dwarakeswar which joins the river Shilabati about 6 km east of Ghatal. Rupnarayan then is met by distributaries of Damodar and ultimately confluences with the Ganga at Gadiara-Geonkhali area. At Kolaghat area various industries are located. From these industry efluents this river is becoming more polluted.

• Location

Kolaghat, West Bengal, India

• Current status

Kolaghat to Benpur is the polluted stretch of this river.

Major towns located on the bank of the polluted stretch:

Tomlin

• Present status

Water Quality

Major water polluting industries located within the catchment area of the river Rupnarayan

• Prevention
  1. What should we stop?

Ganga contains high coliforms, BOD & suspended solids. So firstly, we should avoid releasing construction waste and the untreated sewage in to lakes. Avoid throwing solid waste, plastic, things made up with metals. Avoid harmful untreated chemicals, hot water and ass released from industries.

• What should do?

Adsorption: It is the process of solid holds molecules of liquid or solute as a thin film.

Chlorination: It is the most widely used disinfectant for the treatment of waste water.

Ion exchange: It is the process of demineralization.

Chemical extraction :Separation of various water solvent.

Membrane separation :Separation of various molecules through membrane, it depends on the pore size and molecular size.

Electrokinetics  :It is a procedure of a low-voltage direct-current electric field is applied across a section of contaminated soil to move contaminants.

Bioleaching: Removes heavy metals.

Phytoremediation: Application of plants to remove wastes from water.

• References
  • http://emis.wbpcb.gov.in/waterquality/viewsampledatacitizen.do
  • https://www.wbpcb.gov.in/#
  • Action Plan for Rejuvenation of River Rupnarayan Tamluk,West Bengal
  • Persistent organochlorine pesticides in sediments from Haldi and Rupnarayan river in West Bengal, India
  • https://www.researchgate.net/figure/Channel-shifting-of-the-Rupnarayan-River-at-Kolaghat-1972-2010_fig1_284508733
  • https://www.sciencedirect.com/science/article/pii/S111049291630011X